/*
 * Copyright 2013 Netflix, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.me.springcloud.feign.ssl;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.security.KeyStore;
import java.security.Principal;
import java.security.PrivateKey;
import java.security.SecureRandom;
import java.security.cert.Certificate;
import java.security.cert.X509Certificate;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.Map;

import javax.net.ssl.KeyManager;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocket;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509KeyManager;
import javax.net.ssl.X509TrustManager;

/**
 * Used for ssl tests to simplify setup.
 */
public final class TrustingSSLSocketFactory extends SSLSocketFactory implements X509TrustManager, X509KeyManager {

	private static final Map<String, SSLSocketFactory> sslSocketFactories = new LinkedHashMap<String, SSLSocketFactory>();
	private static final char[] KEYSTORE_PASSWORD = "vpos123".toCharArray();
	private final static String[] ENABLED_CIPHER_SUITES = { "SSL_RSA_WITH_3DES_EDE_CBC_SHA" };
	private final SSLSocketFactory delegate;
	private final String serverAlias;
	private final PrivateKey privateKey;
	private final X509Certificate[] certificateChain;

	private TrustingSSLSocketFactory(String serverAlias) {
		try {
			SSLContext sc = SSLContext.getInstance("SSL");
			sc.init(new KeyManager[] { this }, new TrustManager[] { this }, new SecureRandom());
			this.delegate = sc.getSocketFactory();
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		this.serverAlias = serverAlias;
		if (serverAlias.isEmpty()) {
			this.privateKey = null;
			this.certificateChain = null;
		} else {
			try {
				FileInputStream stream = new FileInputStream("D:\\Java\\workspace_epay_17_6_6\\EPayment\\EPayment-web\\profiles\\prd\\cer\\third\\bill99\\81231006300107890.jks");
				KeyStore keyStore = loadKeyStore(stream);
				this.privateKey = (PrivateKey) keyStore.getKey(serverAlias, KEYSTORE_PASSWORD);
				Certificate[] rawChain = keyStore.getCertificateChain(serverAlias);
				this.certificateChain = Arrays.copyOf(rawChain, rawChain.length, X509Certificate[].class);
			} catch (Exception e) {
				throw new RuntimeException(e);
			}
		}
	}

	public static SSLSocketFactory get() {
		return get("");
	}

	public synchronized static SSLSocketFactory get(String serverAlias) {
		if (!sslSocketFactories.containsKey(serverAlias)) {
			sslSocketFactories.put(serverAlias, new TrustingSSLSocketFactory(serverAlias));
		}
		return sslSocketFactories.get(serverAlias);
	}

	static Socket setEnabledCipherSuites(Socket socket) {
		SSLSocket.class.cast(socket).setEnabledCipherSuites(ENABLED_CIPHER_SUITES);
		return socket;
	}

	private static KeyStore loadKeyStore(InputStream inputStream) throws IOException {
		try {
			KeyStore keyStore = KeyStore.getInstance("JKS");
			keyStore.load(inputStream, KEYSTORE_PASSWORD);
			return keyStore;
		} catch (Exception e) {
			throw new RuntimeException(e);
		} finally {
			inputStream.close();
		}
	}

	@Override
	public String[] getDefaultCipherSuites() {
		return ENABLED_CIPHER_SUITES;
	}

	@Override
	public String[] getSupportedCipherSuites() {
		return ENABLED_CIPHER_SUITES;
	}

	@Override
	public Socket createSocket(Socket s, String host, int port, boolean autoClose) throws IOException {
		return setEnabledCipherSuites(delegate.createSocket(s, host, port, autoClose));
	}

	@Override
	public Socket createSocket(String host, int port) throws IOException {
		return setEnabledCipherSuites(delegate.createSocket(host, port));
	}

	@Override
	public Socket createSocket(InetAddress host, int port) throws IOException {
		return setEnabledCipherSuites(delegate.createSocket(host, port));
	}

	@Override
	public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException {
		return setEnabledCipherSuites(delegate.createSocket(host, port, localHost, localPort));
	}

	@Override
	public Socket createSocket(InetAddress address, int port, InetAddress localAddress, int localPort) throws IOException {
		return setEnabledCipherSuites(delegate.createSocket(address, port, localAddress, localPort));
	}

	public X509Certificate[] getAcceptedIssuers() {
		return null;
	}

	public void checkClientTrusted(X509Certificate[] certs, String authType) {
	}

	public void checkServerTrusted(X509Certificate[] certs, String authType) {
	}

	@Override
	public String[] getClientAliases(String keyType, Principal[] issuers) {
		return null;
	}

	@Override
	public String chooseClientAlias(String[] keyType, Principal[] issuers, Socket socket) {
		return null;
	}

	@Override
	public String[] getServerAliases(String keyType, Principal[] issuers) {
		return null;
	}

	@Override
	public String chooseServerAlias(String keyType, Principal[] issuers, Socket socket) {
		return serverAlias;
	}

	@Override
	public X509Certificate[] getCertificateChain(String alias) {
		return certificateChain;
	}

	@Override
	public PrivateKey getPrivateKey(String alias) {
		return privateKey;
	}
}